Fast, free, and privacy-first browser utilities for software engineers. Decode JWTs, test regex, convert timestamps, inspect DNS, parse user agents, generate QR codes, clean code, and calculate hashes with zero server latency.
Format, beautify, and minify JSON, XML, HTML, CSS, JavaScript, SQL, and YAML code.
Format, beautify, inspect, and minify JSON strings with custom indentation and line-by-line syntax error detection.
Format, indent, prettify, and minify XML documents with syntax validation and tree structure formatting.
Format and clean HTML markup strings with tag indentation, self-closing tag handling, and HTML minification.
Format, expand, and minify CSS style rulesets, selectors, properties, and media queries.
Format JavaScript code with clean indentation and minify JS scripts for production optimization.
Format complex SQL queries with uppercase keyword capitalization (SELECT, FROM, WHERE, JOIN) and subquery indentation.
Format, clean, and convert YAML configuration data to JSON strings.
Decode, inspect claims, and generate signed JWT tokens (HS256/384/512).
Decode JSON Web Tokens (JWT) to inspect Header, Payload claims, expiration timestamps, and signature structure.
Generate and sign custom JSON Web Tokens (JWT) using HS256, HS384, or HS512 HMAC algorithms.
Test regex live with match highlighting or generate patterns from presets.
Test regular expressions in real-time with live match highlighting, capture groups, regex flags (g, i, m, s, u, y), and replace preview.
Generate regular expression patterns from structured inputs for Email, Phone, Date, URL, Postal Code, Credit Card, and Passwords.
Convert Unix timestamps to ISO/UTC/Local strings and ticker generator.
Convert Unix timestamps (seconds and milliseconds) to ISO 8601, UTC, Local time, and relative time ('2 hours ago').
Generate current system epoch timestamps in seconds, milliseconds, ISO 8601, and UTC with live-updating ticker.
Inspect HTTP headers, lookup DNS records via DoH, IP CIDR math, and User-Agent parsing.
Search, filter, and inspect common HTTP request and response headers for Security, CORS, Caching, and Authentication.
Lookup domain DNS records via DNS-over-HTTPS (DoH) for A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, and SRV records.
Analyze IPv4/IPv6 addresses, detect private subnet ranges, and calculate CIDR subnet masks, usable hosts, and broadcast IPs.
Parse User-Agent strings to detect Browser, OS, Device category (Mobile/Tablet/Desktop), CPU architecture, and Bot status.
Generate custom QR Codes and 1D Barcodes with PNG and print download.
Generate custom QR Codes for Text, URL, Email, Phone, SMS, WiFi, vCard, Location, and Calendar events with PNG download.
Generate 1D barcodes for Code128, EAN-13, EAN-8, UPC-A, UPC-E, Code39, ITF, and Codabar formats with PNG download and print support.
Validate JSON and XML syntax accuracy with line and column error diagnostics.
Validate JSON syntax accuracy with precise error line, column index, and helpful troubleshooting warnings.
Validate XML markup syntax, unclosed tags, root element hierarchy, and attribute quote consistency.
Search 150+ file extensions and MIME media types by category.
Encode and decode Base64 strings, binary files, and percent-encoded URLs.
Encode text strings and binary files to Base64 format with UTF-8 support and URL-safe Base64 options.
Decode Base64 encoded strings back to original UTF-8 text or plain binary data.
Encode URI components, Unicode characters, and special query symbols according to RFC 3986 standards.
Decode percent-encoded URL parameters and URI strings back to unescaped UTF-8 text.
Decode JSON Web Tokens (JWT) to inspect Header, Payload claims, expiration timestamps, and signature structure.
Calculate MD5, SHA-1, SHA-256, and SHA-512 hashes for strings and files.
Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes for text strings or uploaded files.
Calculate 128-bit MD5 message digest hashes for strings and files with lowercase and uppercase hex output.
Generate 256-bit SHA-256 cryptographic hashes for text and binary file inputs.
Generate secure random passwords and evaluate Shannon entropy security.
Generate cryptographically secure passwords with custom lengths, character sets, and pronounceable options.
Analyze password security strength, Shannon entropy bits, character diversity, dictionary leaks, and suggestions.
Generate RFC 4122 v4 UUIDs and edit live Markdown with GFM preview.
Live Markdown editor with split-screen preview, GitHub Markdown support, tables, code blocks, images, and lists.
Generate RFC 4122 compliant version-4 UUIDs individually or in bulk quantity (up to 5,000).
